package com.draem0507.refactor;

/**
 * @title 提取接口
 * @desc
 * @atuh lwx
 * @createtime on 2015/11/13 13:00
 */
public class Day_9 {


    interface Bird1 {


        public void eat();


        public void fly();

    }


    interface SongBird extends Bird1 {


        //我们假设有的鸟是不会唱歌的
        public void song();
    }


    interface Bird {


        public void eat();


        public void fly();

        //我们假设有的鸟是不会唱歌的
        public void song();


    }


}
